Apparatus for manufacturing window-glass cylinders



H. l. WALTER.

APPARATUS Foa MANUFACTURING wlNDow GLASS CYLINDERS.

APPLICATION FILED M4N. 31.1919- Patented 0st. 7,1919.

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En srA'rEs PATENT oEEioE.

` HUGO .iOHN WALTER, or BRADFORD, PENNSYLVANIA, Assre'Non To OONsOLrDATED vIWAQHILTIE COMPANY, OF BRADFORD, PENNSYLVANIA@ lAPPA1 A'rUs For:I MANUFACTURING WINDow-GLAss oYLINDERs.

To all whom t may concern Y Be it known that I, HUGO JOHN WALTER,

a citizen of the United States, and a resident Cylinders; and I do hereby declare the following to be a full, clear, and exact description `of the invention,` such as wlll .enable others skilled in the art to whichV it appertains to make and use the same.

My invention relates to an improvement in apparatus for manufacturing window glass cylinders. v v i In one type of apparatus used in this art,` a hoisting cage carries a blower having a downwardly projecting air outlet constructed to make an air tight but yielding and flexible connection with the upper end of the blow pipe carrying the bait, the air being taken into the blower at the open side of the latter and forced out through the blow pipe and bait. The pressure of air required to expand the cylinder and support it against collapsing is comparatively small being 'but a fraction of an ounce greater than the outside air, and this pressure is controlled by the speed of the fan or blower which is under the control' of the operator drawing the cylinder.

kwat sa h Construction, if (mailgate drawing of a cylinder, the motor stops, the

air within` the cylinder is free to escape therefrom through the blower casing, and thus leave the plastic part of the cylinder without the inside support necessary-.to maintain its shape.

This invention relates to the type of apparatus above referred to and its object is to provide means whereby when the supply of air to the glass cylinder from the blower stops, back leak or vent from the cylinder through the blower will be absolutely prevented.

I would have it understood that the inventive idea involved is not rhowever dependent on the particular construction of apparatus as shown, and that changes may bemade without departing from the spirit of my invention.

Inthe accompanying drawings; Figure 1 is a view in elevation partly in section of an Specification of Letters Patent.

Patented oct. *7, 1919.

Application led January 31, 1919. Serial No. 274,242.

apparatus embodying my invention, and

Figs. 2 and 3 are views of modications.

1 represents the casing provided with the usual openings 2 at the side, one of which is permanently-closed against all leakage of air by the plate 3,- which is boredcentrally for the passage of the shaft 4 carrying the fan lor blower blades 5. The closure plate Sconstitutesa bearing for the shaft 4, which` latter has a'close fit therein to prevent air leakage, and is coupled up toa motor 14: which drives the same.

'The openingv 2 at the outer side of the casing 1 is' adapted to be closed by the valve 6, which -is constructed to prevent air leakage when it is closed. This valveis mountedY on pins 7 or otherwise supported in position over opening 2,-and ispivotally connected at 8V with the lever 9 fulcrumed to the bracket 10 carried by the casing 1. The lowerv free end ofV this lever is connected by the spring blower, in such manner that when current is'A supplied to the motor the coil will be energized thus pulling inwardly on the core and, moving the valve 6 away from its seat. The

valveand its seat may have ground joints to prevent leakage of air around the valve.

From the foregoing it will be seen that v when the motor which actuates the blower, is started, the coil will be energized, thus pulling inwardly on the core and opening the valve for the entrance of air. The instant the motor actuating the blower stops for any reason the coil 13 will be denergized thereby releasing the core and permittin the spring 11 to move the'valve to its close position and thus positively and completely close the only opening in the blower through which any air could pass outwardly from the cylinder.

The blower casing is provided with an air pipe 15 leading therefrom which has a coupling 16 for the attachment of the blow pipe 17 carrying the bait 18, and the whole including the motor for actuating the blower is carried on a cage 19 suspended from a eof suitable cable and constitutes the drawing mechanism of the cylinder forming apparatus.

In some systenistlie amount of air supplied tothe glass lcylinder is greater than t-he amount needed to distend and maintain the shape and size of the cylinder, and in., such systems it is necessary to provide -avent through which the air in the cylinder can escape. Such systems are known as the with ports in thevcasing and operated by a magnet or a solenoid could be employed as in Fig. 3 hence Ido not confine myself to the details shown. Y 'y i Having fully described my invention what l claim as new and desire to secure by Letters Patent, is

1..,An apparatus for supplying air to a glass cylinder during the drawing operation, comprising a blower having an air inlet,` a

Yvalve* for closing said inlet and automati- 'ca'llyf operating devices for actuating the valve to close the air inlet when the blower stops. Y

2. An apparatus for supplying air to a glasscylinder during the drawing operation,

comprisinga blowerhaving an air inlet, aV valve for closing said inlet and automati-l callyv operating devices for actuating the Y Gope'iof this patent'may'be obtained for ve cents each, by addressing the Commissioner of Patents, I

' 1 *Washingtom D. 0

valve to close the air inlet whenthe blower Vstops and for holding it closed while the -blower is not operating.

3. An apparatus for supplyingl airto a. glass cylinder while being drawn comprising a blower having an air inlet, a valve for closingsaid. inlet, and electro-magnetic device for opening the air valve.

4:.'An'apparatus for supplyingair to a Vglass cylinder during the drawing operation Vcomprising a blower having an air inlet, a

valve for closing said inlet, an electric motor for the blower and electro-magnetic means for opening the said air valve, the said device having connection with the motor whereby when the latter stops the device will release the valve and permit it to close.

5. An apparatus for supplying air to a glass cylinder while being' drawn, comprising a blower" having an air inlet, a valve" for closing said inlet, a spring for normally holding vthe valvev closed and electro-magnetic device for opening the valve and forv holding it open while the blower is in 0peration.

6.' An apparatus for supplying air to glass Y cylinders during the drawing operation,

comprising a mechanical blower having an air inlet and an air outlet, the blower being located .intermediate the inlet and outlet, the

outlet having means for attaching a blow pipe and bait thereto, and an automatically operating valve for Vclosing the inlet when the blower is not operating. Y

In testimony whereof, l have signed this specification in the presence of two subscribiiiieo JOHN WALTER.. 1

ing witnesses.

lVitnesses W. E. BURDicK, C. PonJsTE. 

